B - Operations – Transporting – 61 – G
Patent
B - Operations, Transporting
61
G
213/42
B61G 9/18 (2006.01)
Patent
CA 1271727
RAILROAD CAR DRAFT GEAR ASSEMBLY WITH FRICTION BORE WEAR LINERS ABSTRACT A draft gear assembly to cushion and absorb impacting forces on a railroad car coupler system includes a housing containing a spring package. Through a follower the spring package interacts with a set of friction shoes. The shoes are positioned in friction shoe seats in a friction bore section of the housing. Each seat includes a wear liner in a recess formed on an inner surface of the housing friction bore section. The shoes in turn engage a wedge which ex- tends from the housing to connect with other elements of the coupler system. The liners are made of a selective steel initially deformed by the impacting forces. This deformable quality allows wider dimensional variations between the shoes, liners, and the housing recesses. After deformation the liners fit properly in the recesses and the shoes in the seats to optimize areas of contact there- between. During subsequent operation of the car the impacting forces work harden the liners to a level selective- ly less than the hardness of the shoes to further increase wear resistance. Because the liners may be readily removed and replaced, a useful life of the housing may be extended indefinitely.
503319
Hammarlund Richard C.
Mcfadden Fincham
Miner Enterprises Inc.
LandOfFree
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